Outdoor arm chair



FIG. 1 is a front perspective view of an armchair showing my design;

FIG. 2 illustrates a rear view of the arm chair of FIG. 1;

FIG. 3 illustrates a side view of the arm chair of FIG. 1; and

FIG. 4 illustrates a front view of the arm chair of FIG. 1.

The ornamental design for an outdoor arm chair, as shown.